src/third_party/ffmpeg/libavcodec/x86/idct_sse2_xvid.c

   1 /*
   2  * XVID MPEG-4 VIDEO CODEC
   3  * - SSE2 inverse discrete cosine transform -
   4  *
   5  * Copyright(C) 2003 Pascal Massimino <skal@planet-d.net>
   6  *
   7  * Conversion to gcc syntax with modifications
   8  * by Alexander Strange <astrange@ithinksw.com>
   9  *
  10  * Originally from dct/x86_asm/fdct_sse2_skal.asm in Xvid.
  11  *
  12  * This file is part of FFmpeg.
  13  *
  14  * Vertical pass is an implementation of the scheme:
  15  *  Loeffler C., Ligtenberg A., and Moschytz C.S.:
  16  *  Practical Fast 1D DCT Algorithm with Eleven Multiplications,
  17  *  Proc. ICASSP 1989, 988-991.
  18  *
  19  * Horizontal pass is a double 4x4 vector/matrix multiplication,
  20  * (see also Intel's Application Note 922:
  21  *  http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
  22  *  Copyright (C) 1999 Intel Corporation)
  23  *
  24  * More details at http://skal.planet-d.net/coding/dct.html
  25  *
  26  * FFmpeg is free software; you can redistribute it and/or
  27  * modify it under the terms of the GNU Lesser General Public
  28  * License as published by the Free Software Foundation; either
  29  * version 2.1 of the License, or (at your option) any later version.
  30  *
  31  * FFmpeg is distributed in the hope that it will be useful,
  32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  34  * Lesser General Public License for more details.
  35  *
  36  * You should have received a copy of the GNU Lesser General Public License
  37  * along with FFmpeg; if not, write to the Free Software Foundation,
  38  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  39  */
  40
  41 #include "libavutil/mem.h"
  42 #include "libavutil/x86/asm.h"
  43 #include "idct_xvid.h"
  44 #include "idctdsp.h"
  45
  46 #if HAVE_SSE2_INLINE
  47
  48 /**
  49  * @file
  50  * @brief SSE2 idct compatible with xvidmmx
  51  */
  52
  53 #define X8(x)     x,x,x,x,x,x,x,x
  54
  55 #define ROW_SHIFT 11
  56 #define COL_SHIFT 6
  57
  58 DECLARE_ASM_CONST(16, int16_t, tan1)[] = {X8(13036)}; // tan( pi/16)
  59 DECLARE_ASM_CONST(16, int16_t, tan2)[] = {X8(27146)}; // tan(2pi/16) = sqrt(2)-1
  60 DECLARE_ASM_CONST(16, int16_t, tan3)[] = {X8(43790)}; // tan(3pi/16)-1
  61 DECLARE_ASM_CONST(16, int16_t, sqrt2)[]= {X8(23170)}; // 0.5/sqrt(2)
  62 DECLARE_ASM_CONST(8,  uint8_t, m127)[] = {X8(127)};
  63
  64 DECLARE_ASM_CONST(16, int16_t, iTab1)[] = {
  65  0x4000, 0x539f, 0xc000, 0xac61, 0x4000, 0xdd5d, 0x4000, 0xdd5d,
  66  0x4000, 0x22a3, 0x4000, 0x22a3, 0xc000, 0x539f, 0x4000, 0xac61,
  67  0x3249, 0x11a8, 0x4b42, 0xee58, 0x11a8, 0x4b42, 0x11a8, 0xcdb7,
  68  0x58c5, 0x4b42, 0xa73b, 0xcdb7, 0x3249, 0xa73b, 0x4b42, 0xa73b
  69 };
  70
  71 DECLARE_ASM_CONST(16, int16_t, iTab2)[] = {
  72  0x58c5, 0x73fc, 0xa73b, 0x8c04, 0x58c5, 0xcff5, 0x58c5, 0xcff5,
  73  0x58c5, 0x300b, 0x58c5, 0x300b, 0xa73b, 0x73fc, 0x58c5, 0x8c04,
  74  0x45bf, 0x187e, 0x6862, 0xe782, 0x187e, 0x6862, 0x187e, 0xba41,
  75  0x7b21, 0x6862, 0x84df, 0xba41, 0x45bf, 0x84df, 0x6862, 0x84df
  76 };
  77
  78 DECLARE_ASM_CONST(16, int16_t, iTab3)[] = {
  79  0x539f, 0x6d41, 0xac61, 0x92bf, 0x539f, 0xd2bf, 0x539f, 0xd2bf,
  80  0x539f, 0x2d41, 0x539f, 0x2d41, 0xac61, 0x6d41, 0x539f, 0x92bf,
  81  0x41b3, 0x1712, 0x6254, 0xe8ee, 0x1712, 0x6254, 0x1712, 0xbe4d,
  82  0x73fc, 0x6254, 0x8c04, 0xbe4d, 0x41b3, 0x8c04, 0x6254, 0x8c04
  83 };
  84
  85 DECLARE_ASM_CONST(16, int16_t, iTab4)[] = {
  86  0x4b42, 0x6254, 0xb4be, 0x9dac, 0x4b42, 0xd746, 0x4b42, 0xd746,
  87  0x4b42, 0x28ba, 0x4b42, 0x28ba, 0xb4be, 0x6254, 0x4b42, 0x9dac,
  88  0x3b21, 0x14c3, 0x587e, 0xeb3d, 0x14c3, 0x587e, 0x14c3, 0xc4df,
  89  0x6862, 0x587e, 0x979e, 0xc4df, 0x3b21, 0x979e, 0x587e, 0x979e
  90 };
  91
  92 DECLARE_ASM_CONST(16, int32_t, walkenIdctRounders)[] = {
  93  65536, 65536, 65536, 65536,
  94   3597,  3597,  3597,  3597,
  95   2260,  2260,  2260,  2260,
  96   1203,  1203,  1203,  1203,
  97    120,   120,   120,   120,
  98    512,   512,   512,   512
  99 };
 100
 101 // Temporary storage before the column pass
 102 #define ROW1 "%%xmm6"
 103 #define ROW3 "%%xmm4"
 104 #define ROW5 "%%xmm5"
 105 #define ROW7 "%%xmm7"
 106
 107 #define CLEAR_ODD(r) "pxor  "r","r" \n\t"
 108 #define PUT_ODD(dst) "pshufhw  $0x1B, %%xmm2, "dst"   \n\t"
 109
 110 #if ARCH_X86_64
 111
 112 # define ROW0 "%%xmm8"
 113 # define REG0 ROW0
 114 # define ROW2 "%%xmm9"
 115 # define REG2 ROW2
 116 # define ROW4 "%%xmm10"
 117 # define REG4 ROW4
 118 # define ROW6 "%%xmm11"
 119 # define REG6 ROW6
 120 # define CLEAR_EVEN(r) CLEAR_ODD(r)
 121 # define PUT_EVEN(dst) PUT_ODD(dst)
 122 # define XMMS "%%xmm12"
 123 # define MOV_32_ONLY "#"
 124 # define SREG2 REG2
 125 # define TAN3 "%%xmm13"
 126 # define TAN1 "%%xmm14"
 127
 128 #else
 129
 130 # define ROW0 "(%0)"
 131 # define REG0 "%%xmm4"
 132 # define ROW2 "2*16(%0)"
 133 # define REG2 "%%xmm4"
 134 # define ROW4 "4*16(%0)"
 135 # define REG4 "%%xmm6"
 136 # define ROW6 "6*16(%0)"
 137 # define REG6 "%%xmm6"
 138 # define CLEAR_EVEN(r)
 139 # define PUT_EVEN(dst) \
 140     "pshufhw  $0x1B, %%xmm2, %%xmm2   \n\t" \
 141     "movdqa          %%xmm2, "dst"    \n\t"
 142 # define XMMS "%%xmm2"
 143 # define MOV_32_ONLY "movdqa "
 144 # define SREG2 "%%xmm7"
 145 # define TAN3 "%%xmm0"
 146 # define TAN1 "%%xmm2"
 147
 148 #endif
 149
 150 #define ROUND(x) "paddd   "x
 151
 152 #define JZ(reg, to)                         \
 153     "testl     "reg","reg"            \n\t" \
 154     "jz        "to"                   \n\t"
 155
 156 #define JNZ(reg, to)                        \
 157     "testl     "reg","reg"            \n\t" \
 158     "jnz       "to"                   \n\t"
 159
 160 #define TEST_ONE_ROW(src, reg, clear)       \
 161     clear                                   \
 162     "movq     "src", %%mm1            \n\t" \
 163     "por    8+"src", %%mm1            \n\t" \
 164     "paddusb  %%mm0, %%mm1            \n\t" \
 165     "pmovmskb %%mm1, "reg"            \n\t"
 166
 167 #define TEST_TWO_ROWS(row1, row2, reg1, reg2, clear1, clear2) \
 168     clear1                                  \
 169     clear2                                  \
 170     "movq     "row1", %%mm1           \n\t" \
 171     "por    8+"row1", %%mm1           \n\t" \
 172     "movq     "row2", %%mm2           \n\t" \
 173     "por    8+"row2", %%mm2           \n\t" \
 174     "paddusb   %%mm0, %%mm1           \n\t" \
 175     "paddusb   %%mm0, %%mm2           \n\t" \
 176     "pmovmskb  %%mm1, "reg1"          \n\t" \
 177     "pmovmskb  %%mm2, "reg2"          \n\t"
 178
 179 ///IDCT pass on rows.
 180 #define iMTX_MULT(src, table, rounder, put) \
 181     "movdqa        "src", %%xmm3      \n\t" \
 182     "movdqa       %%xmm3, %%xmm0      \n\t" \
 183     "pshufd   $0x11, %%xmm3, %%xmm1   \n\t" /* 4602 */ \
 184     "punpcklqdq   %%xmm0, %%xmm0      \n\t" /* 0246 */ \
 185     "pmaddwd     "table", %%xmm0      \n\t" \
 186     "pmaddwd  16+"table", %%xmm1      \n\t" \
 187     "pshufd   $0xBB, %%xmm3, %%xmm2   \n\t" /* 5713 */ \
 188     "punpckhqdq   %%xmm3, %%xmm3      \n\t" /* 1357 */ \
 189     "pmaddwd  32+"table", %%xmm2      \n\t" \
 190     "pmaddwd  48+"table", %%xmm3      \n\t" \
 191     "paddd        %%xmm1, %%xmm0      \n\t" \
 192     "paddd        %%xmm3, %%xmm2      \n\t" \
 193     rounder",     %%xmm0              \n\t" \
 194     "movdqa       %%xmm2, %%xmm3      \n\t" \
 195     "paddd        %%xmm0, %%xmm2      \n\t" \
 196     "psubd        %%xmm3, %%xmm0      \n\t" \
 197     "psrad           $11, %%xmm2      \n\t" \
 198     "psrad           $11, %%xmm0      \n\t" \
 199     "packssdw     %%xmm0, %%xmm2      \n\t" \
 200     put                                     \
 201     "1:                               \n\t"
 202
 203 #define iLLM_HEAD                           \
 204     "movdqa   "MANGLE(tan3)", "TAN3"  \n\t" \
 205     "movdqa   "MANGLE(tan1)", "TAN1"  \n\t" \
 206
 207 ///IDCT pass on columns.
 208 #define iLLM_PASS(dct)                      \
 209     "movdqa   "TAN3", %%xmm1          \n\t" \
 210     "movdqa   "TAN1", %%xmm3          \n\t" \
 211     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 212     "pmulhw   %%xmm5, %%xmm1          \n\t" \
 213     "paddsw   %%xmm4, "TAN3"          \n\t" \
 214     "paddsw   %%xmm5, %%xmm1          \n\t" \
 215     "psubsw   %%xmm5, "TAN3"          \n\t" \
 216     "paddsw   %%xmm4, %%xmm1          \n\t" \
 217     "pmulhw   %%xmm7, %%xmm3          \n\t" \
 218     "pmulhw   %%xmm6, "TAN1"          \n\t" \
 219     "paddsw   %%xmm6, %%xmm3          \n\t" \
 220     "psubsw   %%xmm7, "TAN1"          \n\t" \
 221     "movdqa   %%xmm3, %%xmm7          \n\t" \
 222     "movdqa   "TAN1", %%xmm6          \n\t" \
 223     "psubsw   %%xmm1, %%xmm3          \n\t" \
 224     "psubsw   "TAN3", "TAN1"          \n\t" \
 225     "paddsw   %%xmm7, %%xmm1          \n\t" \
 226     "paddsw   %%xmm6, "TAN3"          \n\t" \
 227     "movdqa   %%xmm3, %%xmm6          \n\t" \
 228     "psubsw   "TAN3", %%xmm3          \n\t" \
 229     "paddsw   %%xmm6, "TAN3"          \n\t" \
 230     "movdqa   "MANGLE(sqrt2)", %%xmm4 \n\t" \
 231     "pmulhw   %%xmm4, %%xmm3          \n\t" \
 232     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 233     "paddsw   "TAN3", "TAN3"          \n\t" \
 234     "paddsw   %%xmm3, %%xmm3          \n\t" \
 235     "movdqa   "MANGLE(tan2)", %%xmm7  \n\t" \
 236     MOV_32_ONLY ROW2", "REG2"         \n\t" \
 237     MOV_32_ONLY ROW6", "REG6"         \n\t" \
 238     "movdqa   %%xmm7, %%xmm5          \n\t" \
 239     "pmulhw   "REG6", %%xmm7          \n\t" \
 240     "pmulhw   "REG2", %%xmm5          \n\t" \
 241     "paddsw   "REG2", %%xmm7          \n\t" \
 242     "psubsw   "REG6", %%xmm5          \n\t" \
 243     MOV_32_ONLY ROW0", "REG0"         \n\t" \
 244     MOV_32_ONLY ROW4", "REG4"         \n\t" \
 245     MOV_32_ONLY"  "TAN1", (%0)        \n\t" \
 246     "movdqa   "REG0", "XMMS"          \n\t" \
 247     "psubsw   "REG4", "REG0"          \n\t" \
 248     "paddsw   "XMMS", "REG4"          \n\t" \
 249     "movdqa   "REG4", "XMMS"          \n\t" \
 250     "psubsw   %%xmm7, "REG4"          \n\t" \
 251     "paddsw   "XMMS", %%xmm7          \n\t" \
 252     "movdqa   "REG0", "XMMS"          \n\t" \
 253     "psubsw   %%xmm5, "REG0"          \n\t" \
 254     "paddsw   "XMMS", %%xmm5          \n\t" \
 255     "movdqa   %%xmm5, "XMMS"          \n\t" \
 256     "psubsw   "TAN3", %%xmm5          \n\t" \
 257     "paddsw   "XMMS", "TAN3"          \n\t" \
 258     "movdqa   "REG0", "XMMS"          \n\t" \
 259     "psubsw   %%xmm3, "REG0"          \n\t" \
 260     "paddsw   "XMMS", %%xmm3          \n\t" \
 261     MOV_32_ONLY"  (%0), "TAN1"        \n\t" \
 262     "psraw        $6, %%xmm5          \n\t" \
 263     "psraw        $6, "REG0"          \n\t" \
 264     "psraw        $6, "TAN3"          \n\t" \
 265     "psraw        $6, %%xmm3          \n\t" \
 266     "movdqa   "TAN3", 1*16("dct")     \n\t" \
 267     "movdqa   %%xmm3, 2*16("dct")     \n\t" \
 268     "movdqa   "REG0", 5*16("dct")     \n\t" \
 269     "movdqa   %%xmm5, 6*16("dct")     \n\t" \
 270     "movdqa   %%xmm7, %%xmm0          \n\t" \
 271     "movdqa   "REG4", %%xmm4          \n\t" \
 272     "psubsw   %%xmm1, %%xmm7          \n\t" \
 273     "psubsw   "TAN1", "REG4"          \n\t" \
 274     "paddsw   %%xmm0, %%xmm1          \n\t" \
 275     "paddsw   %%xmm4, "TAN1"          \n\t" \
 276     "psraw        $6, %%xmm1          \n\t" \
 277     "psraw        $6, %%xmm7          \n\t" \
 278     "psraw        $6, "TAN1"          \n\t" \
 279     "psraw        $6, "REG4"          \n\t" \
 280     "movdqa   %%xmm1, ("dct")         \n\t" \
 281     "movdqa   "TAN1", 3*16("dct")     \n\t" \
 282     "movdqa   "REG4", 4*16("dct")     \n\t" \
 283     "movdqa   %%xmm7, 7*16("dct")     \n\t"
 284
 285 ///IDCT pass on columns, assuming rows 4-7 are zero.
 286 #define iLLM_PASS_SPARSE(dct)               \
 287     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 288     "paddsw   %%xmm4, "TAN3"          \n\t" \
 289     "movdqa   %%xmm6, %%xmm3          \n\t" \
 290     "pmulhw   %%xmm6, "TAN1"          \n\t" \
 291     "movdqa   %%xmm4, %%xmm1          \n\t" \
 292     "psubsw   %%xmm1, %%xmm3          \n\t" \
 293     "paddsw   %%xmm6, %%xmm1          \n\t" \
 294     "movdqa   "TAN1", %%xmm6          \n\t" \
 295     "psubsw   "TAN3", "TAN1"          \n\t" \
 296     "paddsw   %%xmm6, "TAN3"          \n\t" \
 297     "movdqa   %%xmm3, %%xmm6          \n\t" \
 298     "psubsw   "TAN3", %%xmm3          \n\t" \
 299     "paddsw   %%xmm6, "TAN3"          \n\t" \
 300     "movdqa   "MANGLE(sqrt2)", %%xmm4 \n\t" \
 301     "pmulhw   %%xmm4, %%xmm3          \n\t" \
 302     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 303     "paddsw   "TAN3", "TAN3"          \n\t" \
 304     "paddsw   %%xmm3, %%xmm3          \n\t" \
 305     "movdqa   "MANGLE(tan2)", %%xmm5  \n\t" \
 306     MOV_32_ONLY ROW2", "SREG2"        \n\t" \
 307     "pmulhw   "SREG2", %%xmm5         \n\t" \
 308     MOV_32_ONLY ROW0", "REG0"         \n\t" \
 309     "movdqa   "REG0", %%xmm6          \n\t" \
 310     "psubsw   "SREG2", %%xmm6         \n\t" \
 311     "paddsw   "REG0", "SREG2"         \n\t" \
 312     MOV_32_ONLY"  "TAN1", (%0)        \n\t" \
 313     "movdqa   "REG0", "XMMS"          \n\t" \
 314     "psubsw   %%xmm5, "REG0"          \n\t" \
 315     "paddsw   "XMMS", %%xmm5          \n\t" \
 316     "movdqa   %%xmm5, "XMMS"          \n\t" \
 317     "psubsw   "TAN3", %%xmm5          \n\t" \
 318     "paddsw   "XMMS", "TAN3"          \n\t" \
 319     "movdqa   "REG0", "XMMS"          \n\t" \
 320     "psubsw   %%xmm3, "REG0"          \n\t" \
 321     "paddsw   "XMMS", %%xmm3          \n\t" \
 322     MOV_32_ONLY"  (%0), "TAN1"        \n\t" \
 323     "psraw        $6, %%xmm5          \n\t" \
 324     "psraw        $6, "REG0"          \n\t" \
 325     "psraw        $6, "TAN3"          \n\t" \
 326     "psraw        $6, %%xmm3          \n\t" \
 327     "movdqa   "TAN3", 1*16("dct")     \n\t" \
 328     "movdqa   %%xmm3, 2*16("dct")     \n\t" \
 329     "movdqa   "REG0", 5*16("dct")     \n\t" \
 330     "movdqa   %%xmm5, 6*16("dct")     \n\t" \
 331     "movdqa   "SREG2", %%xmm0         \n\t" \
 332     "movdqa   %%xmm6, %%xmm4          \n\t" \
 333     "psubsw   %%xmm1, "SREG2"         \n\t" \
 334     "psubsw   "TAN1", %%xmm6          \n\t" \
 335     "paddsw   %%xmm0, %%xmm1          \n\t" \
 336     "paddsw   %%xmm4, "TAN1"          \n\t" \
 337     "psraw        $6, %%xmm1          \n\t" \
 338     "psraw        $6, "SREG2"         \n\t" \
 339     "psraw        $6, "TAN1"          \n\t" \
 340     "psraw        $6, %%xmm6          \n\t" \
 341     "movdqa   %%xmm1, ("dct")         \n\t" \
 342     "movdqa   "TAN1", 3*16("dct")     \n\t" \
 343     "movdqa   %%xmm6, 4*16("dct")     \n\t" \
 344     "movdqa   "SREG2", 7*16("dct")    \n\t"
 345
 346 av_extern_inline void ff_idct_xvid_sse2(short *block)
 347 {
 348     __asm__ volatile(
 349     "movq     "MANGLE(m127)", %%mm0                              \n\t"
 350     iMTX_MULT("(%0)",     MANGLE(iTab1), ROUND(MANGLE(walkenIdctRounders)),      PUT_EVEN(ROW0))
 351     iMTX_MULT("1*16(%0)", MANGLE(iTab2), ROUND("1*16+"MANGLE(walkenIdctRounders)), PUT_ODD(ROW1))
 352     iMTX_MULT("2*16(%0)", MANGLE(iTab3), ROUND("2*16+"MANGLE(walkenIdctRounders)), PUT_EVEN(ROW2))
 353
 354     TEST_TWO_ROWS("3*16(%0)", "4*16(%0)", "%%eax", "%%ecx", CLEAR_ODD(ROW3), CLEAR_EVEN(ROW4))
 355     JZ("%%eax", "1f")
 356     iMTX_MULT("3*16(%0)", MANGLE(iTab4), ROUND("3*16+"MANGLE(walkenIdctRounders)), PUT_ODD(ROW3))
 357
 358     TEST_TWO_ROWS("5*16(%0)", "6*16(%0)", "%%eax", "%%edx", CLEAR_ODD(ROW5), CLEAR_EVEN(ROW6))
 359     TEST_ONE_ROW("7*16(%0)", "%%esi", CLEAR_ODD(ROW7))
 360     iLLM_HEAD
 361     ".p2align 4 \n\t"
 362     JNZ("%%ecx", "2f")
 363     JNZ("%%eax", "3f")
 364     JNZ("%%edx", "4f")
 365     JNZ("%%esi", "5f")
 366     iLLM_PASS_SPARSE("%0")
 367     "jmp 6f                                                      \n\t"
 368     "2:                                                          \n\t"
 369     iMTX_MULT("4*16(%0)", MANGLE(iTab1), "#", PUT_EVEN(ROW4))
 370     "3:                                                          \n\t"
 371     iMTX_MULT("5*16(%0)", MANGLE(iTab4), ROUND("4*16+"MANGLE(walkenIdctRounders)), PUT_ODD(ROW5))
 372     JZ("%%edx", "1f")
 373     "4:                                                          \n\t"
 374     iMTX_MULT("6*16(%0)", MANGLE(iTab3), ROUND("5*16+"MANGLE(walkenIdctRounders)), PUT_EVEN(ROW6))
 375     JZ("%%esi", "1f")
 376     "5:                                                          \n\t"
 377     iMTX_MULT("7*16(%0)", MANGLE(iTab2), ROUND("5*16+"MANGLE(walkenIdctRounders)), PUT_ODD(ROW7))
 378 #if ARCH_X86_32
 379     iLLM_HEAD
 380 #endif
 381     iLLM_PASS("%0")
 382     "6:                                                          \n\t"
 383     : "+r"(block)
 384     : NAMED_CONSTRAINTS_ARRAY(m127,iTab1,walkenIdctRounders,iTab2,iTab3,iTab4,tan3,tan1,tan2,sqrt2)
 385     : XMM_CLOBBERS("%xmm0" , "%xmm1" , "%xmm2" , "%xmm3" ,
 386                    "%xmm4" , "%xmm5" , "%xmm6" , "%xmm7" ,)
 387 #if ARCH_X86_64
 388       XMM_CLOBBERS("%xmm8" , "%xmm9" , "%xmm10", "%xmm11",
 389                    "%xmm12", "%xmm13", "%xmm14",)
 390 #endif
 391       "%eax", "%ecx", "%edx", "%esi", "memory"
 392     );
 393 }
 394
 395 void ff_idct_xvid_sse2_put(uint8_t *dest, int line_size, short *block)
 396 {
 397     ff_idct_xvid_sse2(block);
 398     ff_put_pixels_clamped_mmx(block, dest, line_size);
 399 }
 400
 401 void ff_idct_xvid_sse2_add(uint8_t *dest, int line_size, short *block)
 402 {
 403     ff_idct_xvid_sse2(block);
 404     ff_add_pixels_clamped_mmx(block, dest, line_size);
 405 }
 406
 407 #endif /* HAVE_SSE2_INLINE */